Troops spending Christmas away from home

The video follows Holly Desmond, a seven-year-old girl counting down the days until her father, Sergeant Matthew Desmond, returns from his six-month deployment in Afghanistan. The family prepares for Christmas without him, while managing to stay connected through short phone calls. Holly's mother, Emma, explains her husband's dangerous job of defusing roadside bombs to their children, trying to keep things as normal as possible. Despite the challenges, the family remains hopeful and sends their love and Christmas wishes to Sergeant Desmond.

How do Holly and Kenzo communicate with their father?

What is one way Emma tries to explain their father's work to the children?